You can change the language of your documents such as invoices, drafts, credit notes, packing slips, return forms, and quotes by following the simple steps below.
Step 1: Open Simple Invoice from your Shopify store’s “Apps” section.
Step 2: Click on the “Templates” on the Simple Invoice dashboard.
Step 3: Click on the Language section, and click on the language you wish your documents to print. There are 30+ pre-defined languages.
Step 4: Click on the Save button.